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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 2022–2024

Frequency-modulated continuous-wave lidar using I/Q modulator for simplified heterodyne detection

S. Gao and R. Hui  »View Author Affiliations


Optics Letters, Vol. 37, Issue 11, pp. 2022-2024 (2012)
http://dx.doi.org/10.1364/OL.37.002022


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Abstract

A frequency-modulated continuous-wave (FMCW) lidar is demonstrated with heterodyne detection. The lidar transmitter utilizes an electro-optic I/Q modulator for the first time to generate carrier-suppressed and frequency-shifted FM modulation. This eliminates the need for an acousto-optic frequency shifter commonly used in heterodyne lidar transmitters. It also allows the use of a much wider modulation bandwidth to improve the range resolution. The capability of complex optical field modulation of the I/Q modulator provides an additional degree of freedom compared with an intensity modulator, which will benefit future lidar applications.

© 2012 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(280.3640) Remote sensing and sensors : Lidar

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 22, 2012
Manuscript Accepted: April 4, 2012
Published: May 30, 2012

Citation
S. Gao and R. Hui, "Frequency-modulated continuous-wave lidar using I/Q modulator for simplified heterodyne detection," Opt. Lett. 37, 2022-2024 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-11-2022


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